JP6807655B2 - Packaging bag, pair of rotating bodies and manufacturing equipment - Google Patents

Description

The present invention relates to a packaging bag, a pair of rotating bodies and a manufacturing apparatus.

Conventionally, the contents are formed by heat-welding two laminated film materials or one folded and laminated film material by a heat roll using a packaging bag manufacturing device such as an automatic filling machine. It is known to manufacture a packaging bag in which an internal space that can be accommodated is formed.

According to Patent Document 1, as a packaging bag of this type, a laminated film including a base film layer and a heat-sealing resin layer is heat-sealed in the vertical and horizontal directions to accommodate a space to be packaged. The packaging bag that is divided into sections is described. Further, the packaging bag described in Patent Document 1 is a heat-sealed portion in the vertical direction, and the base film layers on both the front and back sides are fused in a region adjacent to the storage space of the object to be packaged with the intervention of a heat-sealing resin. On the other hand, when the band-shaped fusion part is used as the uneven sealing part from the band-shaped fusion part to the edge of the packaging bag or its vicinity, the band-shaped fusion part projects in the same direction as the unevenness of the uneven sealing part. Therefore, the laminated film portions on the front and back sides enter each other to provide continuous uneven stripes in the length direction of the laminated film.

Further, Patent Document 1 describes a filling machine as a packaging bag manufacturing apparatus, which includes a vertical seal roll as a heat roll for forming a heat seal portion in the vertical direction of the packaging bag. The vertical seal roll of Patent Document 1 includes a heat seal blade provided with an uneven portion that sandwiches and heat seals a laminated film.

Further, Patent Document 2 describes that a packaging bag body as a packaging bag is manufactured by performing heat sealing with a heat roll body as a heat roll provided with a solid seal portion and a sealing seal portion. Further, Patent Document 2 exemplifies that the shape of the basis weight seal portion of the thermal roll body is formed by a linear protrusion extending in a direction intersecting the transport direction of the packaging material.

Further, in Patent Document 3, two pairs of vertical wrapping films for an automatic wrapping machine as heat rolls, in which heat seals are applied to both ends of the wrapping films that are overlapped while pulling down the wrapping films that are bent vertically downward. The seal roll is disclosed. Further, Patent Document 3 discloses that the surface of the heat-sealing blade of one vertical seal roll is subjected to a grid pattern and the surface of the heat-sealing blade of the other vertical seal roll is processed by a horizontal line.

Japanese Unexamined Patent Publication No. 11-236060 Japanese Unexamined Patent Publication No. 2005-088911 JP-A-2007-246110

By the way, the heat-sealed portion in the vertical direction of the packaging bag described in Patent Document 1 is a band-shaped fusion portion located in a region adjacent to the storage space of the packaged object to increase the heat-sealing strength, and the band-shaped fusion portion. A concavo-convex seal portion extending from the portion to the edge of the packaging bag or a portion in the vicinity thereof and formed by the concavo-convex portion of the heat seal blade provided to suppress the slip of the film material during transportation of the film material during manufacturing. , Is provided.

As a result of diligent studies, the present inventor has confirmed that the packaging bag described in Patent Document 1 can satisfy desired performance for liquids, viscous substances, powder granules and other contents. It has been found that there is room for further improvement in the sealing property of the concave-convex sealing portion on the peripheral edge side (outer edge side) of the heat-sealing portion in the vertical direction described in Patent Document 1.

Further, the packaging bag formed by using the heat roll described in Patent Document 2 and Patent Document 3 also has room for further improvement in the sealing property on the outer edge side as in Patent Document 1.

Therefore, the present invention has a portion capable of ensuring the sealing strength and a portion formed to suppress slipping of the film material during manufacturing, and also improves the sealing performance on the outer edge side of these portions. It is an object of the present invention to provide a packaging bag provided with a vertical sealing portion, a pair of rotating bodies that can be used for manufacturing the packaging bag, and a packaging bag manufacturing apparatus including the pair of rotating bodies.

The packaging bag as the first aspect of the present invention includes a strip-shaped vertical seal portion and a horizontal seal portion to which the laminated film materials are joined, and the contents can be accommodated by the vertical seal portion and the horizontal seal portion. The vertical seal portion is formed in a packaging bag in which a large storage space is formed, and the vertical sealing portion is formed at an inner edge side sealing area located adjacent to the storage space and a position farther from the storage space than the inner edge side sealing area. The outer edge side sealing area is provided with an intermediate area located between the inner edge side sealing area and the outer edge side sealing area, and the outer edge side sealing area extends continuously in the vertical direction. It is a vertical seal region having a mesh convex portion, and the intermediate region has a grid-like unevenness or extends continuously in an inclined direction in which at least a part thereof is inclined with respect to the lateral direction. It is characterized in that it is a non-vertical seal region having a non-vertical convex portion.

As one embodiment of the present invention, the inner edge side sealing region has a strip-shaped smooth sealing region that extends continuously in the vertical direction and a band-shaped smooth sealing region that extends continuously in the vertical direction and has fine irregularities formed. It is preferable to include at least one of a strip-shaped satin-finished seal region having an uneven rough surface.

As one embodiment of the present invention, when the vertical eye seal region is the first vertical eye seal region and the vertical eye convex portion is the first vertical eye convex portion, the inner edge side sealing region is in the vertical direction. It is preferable to include a second vertical seal region having a continuously extending second vertical convex portion.

As one embodiment of the present invention, it is preferable that the first vertical seal region and the second vertical seal region are adjacent to the non-vertical seal region.

As one embodiment of the present invention, the non-vertical convex portion of the non-vertical seal region is formed from the first vertical convex portion of the first vertical seal region to the second vertical seal region. It is preferable that it extends continuously to the second vertical convex portion.

As one embodiment of the present invention, the non-vertical convex portion is a horizontal convex portion that extends continuously in the lateral direction, and a plurality of the horizontal convex portions are formed in the non-vertical seal region. It is preferably a horizontal seal region.

As one embodiment of the present invention, the non-vertical convex portion is an inclined convex portion continuously extending in the inclined direction, and the non-vertical sealing region is formed with a plurality of inclined convex portions. It is preferable that the sloped seal area is formed.

As one embodiment of the present invention, the non-vertical convex portion is a V-shaped convex portion that extends continuously in a V shape, and the non-vertical seal region has the V-shaped convex portion. It is preferable that a plurality of V-shaped seal regions are formed.

As one embodiment of the present invention, the non-vertical convex portion is a wavy convex portion that continuously extends in a wavy line in the horizontal direction, and the non-vertical seal region is the wavy convex portion. Is preferably a wavy seal region in which a plurality of the above are formed.

As one embodiment of the present invention, the non-vertical convex portion is a continuous bow-shaped convex portion, and a plurality of the non-vertical convex portions are formed in the non-vertical seal region. It is preferably the bow-eye seal area.

As one embodiment of the present invention, it is preferable that the vertical seal portion and the horizontal seal portion are heat seal portions in which the laminated film materials are heat-welded.

In the pair of rotating bodies as the second aspect of the present invention, the laminated film materials are sandwiched by the sandwiching portion and conveyed in the vertical direction, and the film materials overlapped by heat and pressure are joined at the sandwiching portion. A pair of rotating bodies, the outer surface of one rotating body, includes a first region including at least one of a smooth annular surface, a satin-finished annular surface, and an annular convex portion extending continuously in the circumferential direction, and the circumference thereof. It is located between a second region having an annular convex portion extending continuously in the direction and the first region and the second region in the axial direction of the one rotating body, and has a grid-like unevenness. Or, at least a part thereof is provided with a third region having a convex portion continuously extending in the axial direction or an inclined direction inclined with respect to the axial direction, and is provided on the outer surface of the other rotating body. Is arranged so as to face the first region, and by sandwiching the film material between the first region and the first region, a first seal portion is formed on the film material along the surface shape of the first region. The corresponding region is arranged to face the second region, and the film material is sandwiched between the second region to form a seal portion on the film material along the surface shape of the second region. The film material is arranged so as to face the second corresponding region and the third region, and by sandwiching the film material between the third region, the film material is provided with a sealing portion along the surface shape of the third region. It is characterized in that a third corresponding region to be formed is provided.

A packaging bag manufacturing apparatus as a third aspect of the present invention is characterized by including the pair of rotating bodies.

According to the present invention, the present invention has a portion capable of ensuring the sealing strength and a portion formed to suppress slippage of the film material during manufacturing, and also has a sealing property on the outer edge side of these portions. It is possible to provide a packaging bag having an improved vertical seal portion, a pair of rotating bodies that can be used for manufacturing the packaging bag, and a packaging bag manufacturing apparatus having the pair of rotating bodies.

It is a front view of the packaging bag as one Embodiment of this invention. FIG. 1 is a sectional view taken along the line AA of FIG. FIG. 2 is an enlarged cross-sectional view of FIG. 2 in which the vicinity of the vertical seal portion is enlarged. It is BB sectional view of FIG. FIG. 4 is an enlarged cross-sectional view of FIG. 4 in which the vicinity of the intersection region where the vertical seal portion and the horizontal seal portion intersect is enlarged. It is a figure which shows the modification of the non-vertical seal region. It is a figure which shows the manufacturing apparatus of the packaging bag as one Embodiment in this invention. It is a figure which shows the pair of rotating bodies as one Embodiment in this invention. It is a figure which shows the outer surface of the heat seal blade of one rotating body shown in FIG. It is a figure which shows the outer surface of the heat seal blade of the other rotating body shown in FIG. It is a figure which shows the modification of the vertical seal part shown in FIG.

Hereinafter, embodiments of the packaging bag, the pair of rotating bodies, and the manufacturing apparatus according to the present invention will be described with reference to FIGS. 1 to 11. In addition, the same reference numerals are given to common members and parts in each figure.

FIG. 1 is a front view of the packaging bag 1 as an embodiment of the packaging bag according to the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is an enlarged cross-sectional view of a part of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. 1, and FIG. 5 is an enlarged cross-sectional view of a part of FIG.

As shown in FIGS. 1 to 5, the packaging bag 1 is formed by heat-welding (heat-sealing) a film material that has been folded in half and overlapped to partition a storage space S that can store the contents. Specifically, the packaging bag 1 is vertically spaced from the folded-back portion 2 and the vertical sealing portion 3 formed by heat-sealing the free end portion of one film material folded back by the folded-back portion 2. It is provided with a horizontal seal portion 4 formed by heat-sealing between the folded-back portion 2 and the vertical seal portion 3 at two locations. The accommodation space S is divided by the folded-back portion 2, the vertical seal portion 3, and the two horizontal seal portions 4.

The "vertical direction" referred to in the present application means one direction and the opposite direction in the front view when the packaging bag is viewed from the thickness direction (the same direction as the thickness direction of the film material), and the packaging bag 1 of the present embodiment. Then, it means the vertical direction in the front view of FIG. The transport direction in the manufacturing apparatus 20 (see FIG. 7), which will be described later, coincides with one vertical direction (downward in the front view of FIG. 1). Further, the "horizontal direction" means a direction orthogonal to the vertical direction in the same front view, and in the packaging bag 1 of the present embodiment, it means the left-right direction in the front view of FIG.

First, the film material constituting the packaging bag 1 will be described. The packaging bag 1 of the present embodiment is formed by heat-sealing a single film material that has been folded in half and overlapped. This film material is composed of, for example, a base material layer made of a biaxially stretched nylon film, a polyethylene terephthalate film, a polypropylene film, or the like, and a sealant layer made of, for example, a low-density polyethylene resin or various other polyethylene resins. It is composed of a laminated film in which two layers are laminated. Then, the sealant layer is folded back so as to be inside, and the sealant layers are welded to each other by heat sealing. In addition, in order to add functions such as gas barrier property, strength, cold resistance, and pinhole resistance, a single layer or a plurality of intermediate layers may be provided between the base material layer and the sealant layer. As the intermediate layer, for example, various vapor deposition films having high gas barrier properties, various nylon films having high pinhole resistance, metal foils such as aluminum foil, and the like can be used.

Next, the details of the packaging bag 1 of the present embodiment will be described.

The folded-back portion 2 is a portion formed by folding one film material in half. The folded-back portion 2 of the present embodiment is a fold portion extending in the vertical direction formed by folding one film material in half in the horizontal direction, and is one side of the accommodation space S in the horizontal direction. (Right side in FIG. 1) is divided.

The vertical seal portion 3 is a strip-shaped heat seal portion extending in the vertical direction formed by heat-welding the free end portions of the film materials folded back and overlapped by the folded-back portion 2, and is formed in the accommodation space S. The other side in the horizontal direction (left side in FIG. 1) is partitioned.

The "free end portion" of the film material described above means both ends of the film material that come to a position facing the folded portion 2 in the front view (see FIG. 1) when the film material is folded in half. ing. The vertical seal portion 3 of the present embodiment is formed by heat-sealing the free end portion of the film material, but the vertical seal portion is laterally oriented with the folded portion 2 in the front view (see FIG. 1). The position of the vertical seal portion is not limited to the free end portion of the film material folded in half, as long as it is formed by applying heat seal to the positions at intervals.

The horizontal seal portion 4 is a strip-shaped heat seal portion extending in the horizontal direction formed by heat welding between the folded-back portion 2 and the vertical seal portion 3 at two locations spaced apart in the vertical direction. Yes, both sides of the accommodation space S in the vertical direction (both upper and lower sides in FIG. 1) are partitioned. The horizontal seal portion 4 of the present embodiment does not have a portion protruding to one or the other in the thickness direction, as in the smooth seal region 12 of the vertical seal portion 3 described later, and has a surface on one side in the thickness direction. And the other side surface is composed of a smooth surface. However, the horizontal seal portion 4 is not limited to this configuration, and may have the same configuration as the satin seal region described later, for example.

As described above, the packaging bag 1 of the present embodiment includes a strip-shaped vertical sealing portion 3 and a horizontal sealing portion 4 in which one film material folded in half and laminated by heat sealing is joined. A storage space S capable of accommodating the contents is formed by the folded-back portion 2, the vertical seal portion 3, and the horizontal seal portion 4.

In addition, in FIGS. 1 to 5, one film material is folded in half and overlapped, and the periphery of the portion to be the accommodation space S is joined by a heat seal to form the packaging bag 1. The packaging bag is not limited, and for example, a packaging bag may be formed by stacking two film materials so that the sealant layer is on the inside and joining the periphery of the portion to be the storage space with a heat seal. That is, a strip-shaped vertical seal portion and a horizontal seal portion in which two laminated film materials are joined by heat sealing are provided, and a storage space capable of accommodating the contents is formed by the vertical seal portion and the horizontal seal portion. It may be used as a packaging bag. In such a case, the vertical seal portions are formed at two locations spaced apart in the horizontal direction. Further, the horizontal seal portions are formed so as to connect the vertical seal portions at two locations spaced apart in the vertical direction. Further, another packaging bag 1 formed from one film material folded in half or another packaging bag formed from two film materials divides the accommodation space into two. A vertical seal portion may be further formed.

Next, the details of the vertical seal portion 3 will be described.

The vertical seal portion 3 has an inner edge side sealing area located adjacent to the accommodation space and an outer edge side sealing area formed at a position farther from the accommodation space S than the inner edge side sealing area in the front view of FIG. And an intermediate region located between the inner edge side sealing area and the outer edge side sealing area. The inner edge side sealing region, the outer edge side sealing region, and the intermediate region are all formed by joining the laminated film materials to each other by heat sealing. The "inner edge" of the vertical seal portion 3 means the edge of the vertical seal portion 3 on the accommodation space S side, and the "outer edge" of the vertical seal portion 3 means the edge on the opposite side of the accommodation space S side. means.

First, the outer edge side sealing region will be described. The outer edge side sealing area is the vertical sealing area 11. The vertical grain seal region 11 has a vertical grain convex portion 11a that protrudes in one direction in the thickness direction and extends continuously in the vertical direction. More specifically, the vertical seal region 11 as the outer edge side sealing region has a wavy shape in which unevenness is repeated in a cross-sectional view (see FIG. 3) along the horizontal direction, and is vertically extending continuously in the vertical direction. The convex portion 11a and the vertical concave portion 11b are repeatedly formed in the lateral direction. The vertical grain convex portion 11a and the vertical grain concave portion 11b are concepts in the case where the front side (see FIG. 1), which is one side in the thickness direction, is the protruding direction, and the back side, which is the other side in the thickness direction, protrudes. The opposite is true when the direction is set. That is, in the rear view, the vertical eye convex portion 11a shown in FIG. 3 becomes a vertical eye concave portion, and the vertical eye concave portion 11b shown in FIG. 3 protrudes to the other side in the thickness direction and extends continuously in the vertical direction. It becomes a convex part. Hereinafter, for convenience of explanation, the unevenness will be described with the front side, which is one side in the thickness direction, as the protruding direction.

The vertical grain convex portion 11a of the vertical grain seal region 11 has an arc shape in the cross-sectional view of FIG. 3, and the vertical grain concave portion 11b of the vertical grain seal region 11 also has an arc shape in the cross-sectional view of FIG. Further, the pitch of the vertical mesh convex portion 11a in the cross-sectional view of FIG. 3 is preferably 0.1 mm to 3.0 mm, and more preferably 0.5 mm to 1.5 mm. The cross-sectional shapes of the vertical grain convex portion 11a and the vertical grain concave portion 11b of the vertical grain seal region 11 are not limited to those described above, and for example, the vertical grain convex portion 11a and the vertical grain concave portion 11b are cross-sectional shapes of FIG. It is also possible to have a triangular mountain shape, a square shape, or the like visually. Further, the shapes of the vertical grain convex portion 11a and the vertical grain concave portion 11b in the cross-sectional view of FIG. 3 can be different shapes such as an arc shape on one side and a triangular mountain shape on the other side.

Next, the inner edge side sealing region will be described. The inner edge side sealing region is formed at a position adjacent to the accommodation space S, and is a region having at least a portion that is continuously and uniformly heat-sealed over the entire vertical direction of the vertical sealing portion 3. By providing such an inner edge side sealing region, the sealing strength in the vicinity of the accommodation space S of the vertical sealing portion 3 can be improved. Therefore, for example, even if an external force is applied to the film material constituting the packaging bag 1 in a direction in which the vertical seal portion 3 is split and separated at the heat-sealed portion, the vertical seal portion is provided by the inner edge side sealing region. It is possible to prevent 3 from tearing and separating.

Specifically, the inner edge side sealing region includes at least one region of a smooth sealing region, a satin seal region, and a vertical grain sealing region.

The smooth seal region is a region composed of strip-shaped smooth portions extending in the vertical direction. The "smoothing portion" is a portion that does not have a portion protruding to one side and the other side in the thickness direction, and both one side surface and the other side surface in the thickness direction are formed of a smooth surface. is there.

The satin-finished seal region is a region formed of a strip-shaped satin-finished portion extending in the vertical direction and having an uneven rough surface in which fine irregularities are formed on at least one of both side surfaces in the thickness direction. The "concavo-convex rough surface on which fine irregularities are formed" as used herein means that the concave-convex pitch is 40 μm or less and the concave-convex depth is 1 to 10 μm. In particular, the arithmetic mean roughness Ra of the uneven rough surface is preferably in the range of 0.5 to 2.0 μm. Further, the average interval Sm of the fine irregularities on the rough surface is preferably in the range of 15 to 40 μm.

The vertical stitch region is a region having a vertical grain convex portion that extends continuously in the vertical direction, as in the vertical stitch region 11 described above.

Here, as shown in FIG. 1, the inner edge side sealing region of the present embodiment includes a smooth sealing region 12 and a vertical sealing region 14 having a vertical convex portion 14a extending continuously in the vertical direction. It is configured. The details of the inner edge side sealing region of this embodiment will be described later.

Next, the intermediate region will be described. The intermediate region is the non-vertical seal region 13. The non-vertical seal region 13 is a region having a grid-like unevenness, or a region having a non-vertical convex portion that extends continuously in an inclined direction in which at least a part thereof is inclined with respect to the lateral direction or the lateral direction. , Can be. The non-vertical seal region 13 as an intermediate region of the present embodiment is composed of a region having at least a part of the non-vertical convex portion 13a extending continuously in the lateral direction or the inclined direction inclined with respect to the lateral direction. Has been done.

Specifically, the non-vertical seal region 13 as the intermediate region of the present embodiment is located between the vertical seal region 11 as the outer edge side sealing region and the inner edge side sealing region, and at least a part thereof is in the lateral direction. Alternatively, it has a non-vertical convex portion 13a that extends continuously in the inclined direction that is inclined with respect to the horizontal direction. In other words, the non-vertical seal region 13 is a region in which at least a cross section along the vertical direction in which the non-vertical convex portion 13a and the non-vertical concave portion 13b repeatedly appear is present.

More specifically, the non-vertical seal region 13 of the present embodiment has horizontal meshes as non-vertical concave portions 13b between the horizontal grain convex portions as a plurality of non-vertical mesh convex portions 13a extending continuously in the horizontal direction. This is the horizontal seal area where the recess is formed. The horizontal seal region as the non-vertical seal region 13 of the present embodiment has the horizontal convex portion and the non-vertical concave portion 13b as the non-vertical convex portion 13a in an arbitrary cross section along the vertical direction (see FIG. 5). The structure is such that the horizontal recesses appear repeatedly.

The horizontal convex portion as the non-vertical convex portion 13a of the present embodiment has an arc shape in the cross-sectional view of FIG. 5, and the horizontal concave portion as the non-vertical concave portion 13b also has an arc shape in the cross-sectional view of FIG. Further, the pitch of the horizontal convex portion as the non-vertical convex portion 13a in the cross-sectional view of FIGS. 4 and 5 is preferably 0.1 mm to 3.0 mm, preferably 0.5 mm to 1.5 mm. More preferred. The cross-sectional shapes of the horizontal convex portion 13a as the non-vertical convex portion 13a and the horizontal concave portion as the non-vertical concave portion 13b are not limited to those described above, and are, for example, the non-vertical convex portion 13a and the non-vertical mesh. The recess 13b may have a triangular mountain shape, a square shape, or the like in the cross-sectional view of FIG. Further, for example, the shapes of the non-vertical convex portion 13a and the non-vertical concave portion 13b in the cross-sectional view of FIG. 5 can be different shapes such as an arc shape on one side and a triangular mountain shape on the other side.

As described above, the vertical seal portion 3 includes an inner edge side sealing region, a vertical seal region 11 as an outer edge side sealing region, and a non-vertical seal region 13 as an intermediate region. By providing the vertical seal portion 3 with the inner edge side sealing region, it is possible to prevent leakage of the contents accommodated in the accommodation space S and secure the sealing strength of the vertical seal portion 3. Further, since the vertical seal portion 3 includes the non-vertical seal region 13 as an intermediate region, slippage of the film material is suppressed and transfer loss is reduced when the film material is conveyed in the vertical direction during the production of the packaging bag 1. At the same time, it is possible to realize a structure of the heat seal blade that suppresses the occurrence of wrinkles on the film material. Details of the packaging bag 1 at the time of manufacture will be described later (see FIGS. 7 to 10).

Further, by providing the vertical seal region 11 as the outer edge side sealing region, the vertical seal portion 3 provides the sealing property at the position on the outer edge side (left side in FIG. 1) with respect to the inner edge side sealing region and the intermediate region in the horizontal direction. Can be improved. In the inner edge side sealing region and the non-vertical sealing region 13 as an intermediate region, the laminated film materials are joined by heat welding, but the non-vertical sealing region 13 is formed in the vertical direction at the time of manufacture as described above. In order to ensure the transport performance in the direction, there are a plurality of non-vertical convex portions 13a in the vertical direction, at least a part of which extends continuously in the horizontal direction or the inclined direction. When the non-vertical seal region 13 having such a shape is formed by heat welding the laminated film materials, the non-vertical seal region 13 may be formed due to properties such as the waist and elongation performance of the film material. It is difficult to uniformly heat-weld the entire area, and small voids are likely to be partially formed between the film materials. Therefore, when the sealing property between the film materials on the outer edge side of the non-vertical sealing region 13 is lower than that of the non-vertical sealing region 13, sterilization performed after the formation of air, dust, and the packaging bag 1 in the voids of the non-vertical sealing region 13 from the outside. Foreign matter such as steam or liquid such as water used at times may enter. Even if a foreign matter enters the void, it is usually possible to prevent the foreign matter from entering the accommodation space S due to the presence of the inner edge side sealing region, but if there is a gap in the inner edge side sealing region, it is usually possible. There is a risk that foreign matter may enter the accommodation space S. Therefore, it is important to prevent foreign matter from entering the gap of the non-vertical seal region 13, and the vertical seal portion 3 is provided with the vertical seal region 11 as the outer edge side sealing region to provide the non-vertical seal region. It is possible to prevent foreign matter from entering the gap of 13. Further, if the vertical seal region 11 is provided as such an outer edge side sealing region, it is possible to suppress the meandering of the film material in the horizontal direction when the film material is conveyed in the vertical direction during the manufacture of the packaging bag 1. it can. Details of the packaging bag 1 at the time of manufacture will be described later (see FIGS. 7 to 10).

Here, the details of the inner edge side sealing region will be described. As described above, the inner edge side sealing region of the present embodiment is composed of a smooth sealing region 12 and a vertical sealing region 14 having a vertical convex portion 14a extending continuously in the vertical direction. Hereinafter, for convenience of explanation, the vertical stitch region 11 as the outer edge side sealing region is referred to as the “first vertical stitch region 11”, and the vertical grain convex portion 11a of the first vertical stitch region 11 is referred to as the “first vertical stitch convex portion 11”. 11a ”. Further, the vertical stitch region 14 in the outer edge side sealing region is referred to as a "second vertical stitch region 14", and the vertical grain convex portion 14a of the second vertical stitch region 14 is referred to as a "second vertical stitch convex portion 14a".

The smoothing seal region 12 is composed of a strip-shaped smoothing portion 12a extending in the vertical direction. More specifically, the smoothing portion 12a constituting the smoothing seal region 12 of the present embodiment continuously extends over the entire vertical direction of the vertical sealing portion 3. Further, the smooth seal region 12 is formed at a position closest to the accommodation space S in the inner edge side sealing region, and is formed at a position adjacent to the accommodation space S as shown in FIGS. 1 and 3.

The second vertical seal region 14 is located between the non-vertical seal region 13 as an intermediate region and the smooth seal region 12 in the inner edge side sealing region. More specifically, as shown in FIG. 1, the second vertical seal region 14 is located between the non-vertical seal region 13 and the smooth seal region 12, and is adjacent to the smooth seal region 12. It is provided. By providing the second vertical seal region 14 adjacent to the smooth seal region 12, even if a defect occurs in the smooth seal region 12, liquid leakage from the accommodation space S can be reliably prevented. Can be done.

Further, the first vertical seal region 11 is arranged adjacent to one side (left side in FIG. 1) of the non-vertical seal region 13 in the horizontal direction, that is, adjacent to the outer edge side of the vertical seal portion 3, and the second vertical seal region 3 is arranged. It is preferable that the seal region 14 is arranged adjacent to the other side (right side in FIG. 1) of the non-vertical seal region 13 in the horizontal direction, that is, adjacent to the inner edge side of the vertical seal portion 3. That is, it is preferable that the first vertical seal region 11 and the second vertical seal region 14 are adjacent to the non-vertical seal region 13. With such an arrangement, when the film material is transported in the vertical direction during the production of the packaging bag 1, the transportability of the non-vertical sealing region 13 on both sides in the horizontal direction is less likely to vary, and the film material is wrinkled. Can be suppressed from occurring. The non-vertical convex portion 13a of the non-vertical seal region 13 extends from the first vertical convex portion 11a of the first vertical seal region 11 to the second vertical convex portion 14a of the second vertical seal region 14. It is continuous and continuous without interruption.

Further, the second vertical seal region 14 preferably has the same configuration as the first vertical seal region 11 except that its position is different from that of the first vertical seal region 11. Specifically, the number of the first vertical eye convex portions 11a of the first vertical eye seal region 11 and the distance between the adjacent first vertical eye convex portions 11a are determined by the second vertical eye convex portions of the second vertical eye seal region 14. It is preferable that the number of portions 14a is the same as the number of adjacent second vertical projection portions 14a. Similarly, the number of vertical eye recesses 11b in the first vertical seal region 11 and the spacing between adjacent vertical eye recesses 11b are the number of vertical eye recesses 14b (see FIG. 3) in the second vertical seal area 14 and the distance between them. It is preferable that the spacing is the same as that of the adjacent vertical mesh recesses 14b. In this way, when the film material is transported in the vertical direction during the manufacture of the packaging bag 1, the transportability on both sides of the non-vertical sealing region 13 in the horizontal direction is less likely to vary, and the film material is wrinkled. The occurrence can be further suppressed. However, depending on the thickness of the film material, the number of the first vertical mesh convex portion 11a and the vertical mesh concave portion 11b of the first vertical mesh sealing region 11 and the second vertical mesh convex portion 14a of the second vertical mesh sealing region 14 and The number of the vertical mesh recesses 14b may be different. Further, depending on the thickness of the film material, the distance between the adjacent first vertical mesh protrusions 11a and the adjacent vertical mesh recesses 11b of the first vertical mesh seal region 11 is set to be adjacent to the second vertical mesh seal region 14. The spacing between the second vertical mesh convex portions 14a and the spacing between the adjacent vertical mesh concave portions 14b may be different.

Furthermore, the width of the vertical seal region 3 of the vertical seal portion 3 (in the present embodiment, the first vertical seal region 11 and the second vertical seal region 14) in the horizontal direction and the non-vertical seal region of the vertical seal portion 3 When the total width obtained by adding the horizontal width of the non-vertical seal region 13 in the present embodiment is 100%, the horizontal width of the non-vertical seal region of the vertical seal portion 3 is 10. It is preferably% to 95%, more preferably 50% to 80%. On the contrary, the width of the vertical seal region of the vertical seal portion 3 in the horizontal direction is preferably 5% to 90%, more preferably 20% to 50%. The ratio of the width of the vertical seal area to the width of the non-vertical seal area is the above numerical value depending on the transport loss due to the elongation and slip of the film material and the occurrence of wrinkles and meanders during the manufacture of the packaging bag 1. It can be adjusted appropriately within the range.

As described above, the inner edge side sealing area of the present embodiment is composed of the smooth sealing area 12 and the second vertical seal area 14, but the inner edge side sealing area is not limited to this configuration. However, for example, the inner edge side sealing area of only the smooth seal area, the inner edge side sealing area of only the satin seal area, the inner edge side sealing area of only the second vertical seal area, and the like can be used. Further, it is also possible to form the inner edge side sealing region by any two regions of the smooth sealing region, the satin seal region and the second vertical sealing region. Further, the inner edge side sealing region including all of the smooth sealing region, the satin seal region and the second vertical seal region may be used.

However, it is preferable that the inner edge side sealing region includes at least one of a smooth sealing region and a satin seal region. If the configuration includes a smooth seal region and a satin seal region, when the film material is heat-sealed, a part of the compressed film material easily escapes to the accommodation space S side (easily protrudes), so that the vertical seal portion 3 The amount (thickness) of the film material at a position near the accommodation space S side can be increased (thickened). Therefore, the portion of the film material constituting the packaging bag 1 that is not heat-sealed (around the accommodation space S) is separated by tearing the portion that is joined by the heat seal of the vertical seal portion 3. Even if an external force is applied in the direction and the film material is stretched and deformed at a position near the vertical sealing portion 3, the film material is unlikely to be thinned to the extent that holes are opened. That is, if the inner edge side sealing region includes at least one of the smooth sealing region and the satin-finished sealing region, in addition to the sealing strength of the vertical sealing portion 3, the film at a position near the accommodation space S side of the vertical sealing portion 3 The strength of the material can also be increased.

When trying to form a smooth seal region, the amount of heat supplied to the film material when heat-sealing the film material becomes excessive depending on the material and thickness of the film material constituting the packaging bag 1, and the film material is heated. Shrinkage may occur, resulting in wrinkles in the film material. In such a case, it is particularly preferable to use a satin seal region instead of a smooth seal region. When the satin-finished seal region is formed by heat sealing, the surface obtained by reversing the uneven rough surface is pressed against the film material so that the uneven rough surface is formed. Therefore, the contact area with the film material can be reduced as compared with the case of forming the smooth seal region. That is, when the satin seal region is formed, the amount of heat supplied to the film material can be reduced and the heat shrinkage of the film material can be suppressed as compared with the case where the smooth seal region is formed.

Further, as described above, considering the vertical transportability of the film material during the manufacture of the packaging bag 1, the inner edge side sealing region is adjacent to the non-vertical sealing region 13 as in the present embodiment. It is more preferable to provide the second vertical seal region 14 at the position where the seal is formed. By doing so, as described above, it is possible to suppress the variation in transportability on both sides of the non-vertical seal region 13 in the lateral direction, and to suppress the occurrence of wrinkles in the film material.

Here, in the present embodiment, the horizontal seal region is adopted as the non-vertical seal region 13, but at least a part of the non-vertical seal region is continuously extending in the lateral direction or the inclined direction inclined with respect to the lateral direction. It suffices as long as it has a vertical grain convex portion, and is not limited to the horizontal grain seal region. For example, the non-vertical seal region 13 having the configuration shown in FIGS. 6 (a) to 6 (d) may be used.

The non-vertical seal region 13 shown in FIG. 6A is an inclined convex portion as a plurality of non-vertical convex portions 13a extending continuously in one inclined direction (shown by diagonal lines in FIG. 6A). An inclined portion 13b as a non-vertical concave portion 13b extending continuously in one inclined direction is formed between them (in FIG. 6A, the inclination is shown as between the non-vertical convex portions 13a indicated by diagonal lines). This is the eye seal area. Specifically, the inclined grain convex portion as the non-vertical grain convex portion 13a shown in FIG. 6A projects to the front side, which is one side in the thickness direction, and extends continuously in one inclined direction.

Further, the non-vertical seal region 13 shown in FIG. 6B is a V-shaped convex portion as a plurality of non-vertical convex portions 13a extending continuously in a V shape (V in FIG. 6B). Between the V-shaped recesses 13b extending in a V-shape (shown by the V-shaped line), between the non-vertical convex portions 13a shown by the V-shaped line in FIG. 6B. Is a V-shaped seal region in which (shown as) is formed. Specifically, the V-shaped convex portion as the non-vertical convex portion 13a shown in FIG. 6B projects toward the front side, which is one side in the thickness direction, and is viewed from the front (see FIG. 6B). It extends in a V shape.

The non-vertical seal region 13 shown in FIG. 6C is a wavy convex portion as a plurality of non-vertical convex portions 13a extending continuously in a wavy line in the horizontal direction (wavy in FIG. 6C). A wavy recess 13b extending in a wavy line is formed between the lines (shown by the line) (shown in FIG. 6 (c) as between the non-vertical convex portions 13a shown by the wavy line). This is the wavy seal area. Specifically, the wavy convex portion as the non-vertical convex portion 13a shown in FIG. 6 (c) protrudes to the front side, which is one side in the thickness direction, and is viewed from the front (see FIG. 6 (c)). It extends in a wavy line. The “wavy line” means a shape in which at least two or more peaks and valleys are repeated, and the specific shape of the peaks and valleys of the wavy line is triangular even if it is arcuate. It may be. Therefore, in the case where two or more non-vertical convex portions having a V-shape in the front view shown in FIG. 6B appear repeatedly in the horizontal direction, the front view shown in FIG. 6C is not wavy. It becomes a vertical convex part.

The non-vertical seal region 13 shown in FIG. 6 (d) is a bow-shaped convex portion as a plurality of non-vertical convex portions 13a extending continuously in a bow shape (in FIG. 6 (d), a bow-shaped line is formed. Between (not shown), a bow-shaped recess 13b as a non-vertical concave portion 13b extending continuously in a bow shape is formed (in FIG. 6D, it is shown as between the non-vertical convex portions 13a indicated by the bow-shaped line). This is the bow-eye seal area. The bow-shaped convex portion as the non-vertical convex portion 13a shown in FIG. 6 (d) protrudes to the front side, which is one side in the thickness direction, and extends in a bow shape in the front view (see FIG. 6 (d)). Exists. The "bow shape" means a shape that is curved in an arc, and includes not only a bow shape but also an arc shape.

In addition to this, the non-vertical seal region 13 as an intermediate region may be a region having a grid-like unevenness composed of a plurality of protrusions and a plurality of recesses formed between the plurality of protrusions. .. The term "grid-shaped" as used herein means that a plurality of protrusions and a plurality of recesses are arranged not only in the vertical direction and the horizontal direction but also in the inclined direction. The shape of each grid is not limited to a rectangle, and may be a parallelogram. However, the non-vertical seal region 13 includes a horizontal seal region (see FIG. 1) and an inclined seal region that can maintain a high grip force even when the transport speed in the vertical direction during manufacturing of the packaging bag 1 is relatively high. (See FIG. 6 (a)), V-shaped seal area (see FIG. 6 (b)), wavy seal area (see FIG. 6 (c)), and bow seal area (see FIG. 6 (d)). It is particularly preferable that the packaging bag 1 has a horizontal seal region (see FIG. 1) that can maintain a high grip force even when the transport speed in the vertical direction during manufacturing becomes very large. Details of the packaging bag 1 at the time of manufacture will be described later (see FIGS. 7 to 10).

The intersecting regions where the vertical seal portion 3 and the horizontal seal portion 4 of the present embodiment intersect (regions on both the upper and lower sides of the vertical seal portion 3 in FIG. 1) are formed when the vertical seal portion 3 is formed and the horizontal seal portion 4 It becomes a part that is heat-sealed both at the time of formation of. In the present embodiment, as will be described later, the horizontal seal portion 4 is formed after the vertical seal portion 3 is formed (see FIG. 7 and the like). Therefore, the intersecting region of the present embodiment has a surface similar to that of the horizontal seal portion 4, or a surface in which the unevenness of the surface of the vertical seal portion 3 is slightly crushed. FIG. 5 shows an intersecting region having a surface shape such that the unevenness of the surface of the vertical seal portion 3 is slightly crushed, and in FIG. 5, a code number “4” is attached as the horizontal seal portion 4.

Next, an example of the manufacturing apparatus 20 capable of manufacturing the packaging bag 1 will be described. FIG. 7 is a diagram showing a manufacturing apparatus 20.

As illustrated in FIG. 7, in the manufacturing apparatus 20, the film material 103 unwound from the take-up roll 101 is sequentially passed through the guide rolls 105 and 107, and then folded in half in the width direction by the folding apparatus 109. .. The manufacturing apparatus 20 includes a pair of heat rolls 111 as a pair of rotating bodies to be vertically sealed to be a vertical seal portion 3 of the packaging bag 1 (see FIG. 1 and the like), and a horizontal seal portion 4 of the packaging bag 1 (see FIG. 1 and the like). ), A pair of heat rolls 113 as a pair of rotating bodies, and a pair of heat rolls 113. The film material 103 folded in half by the folding device 109 sequentially passes between the pair of heat rolls 111 that also serve as drawer rolls and between the pair of heat rolls 113 in the vertical direction.

FIG. 8 is a diagram showing a pair of heat rolls 111 as a pair of rotating bodies for applying a vertical seal to be a vertical seal portion 3. Each of the heat rolls 111a and 111b of the pair of heat rolls 111 has flange-shaped heat seal blades 111a1 and 111b1, and the free end portion of the film material 103 folded in half and overlapped is one heat seal. It is sandwiched between the outer surface of the blade 111a1 and the outer surface of the other heat seal blade 111b1. As a result, at the free end portion of the film material 103, a vertical seal extending in the vertical direction as shown by a diagonal line in FIG. 7 is applied. As a result, the vertical seal portion 3 (see FIG. 1 and the like) of the packaging bag 1 can be formed.

Further, each heat roll of the pair of heat rolls 113 is provided with a plurality of heat seal blades 113a protruding in the radial direction and extending in the axial direction at predetermined intervals in the circumferential direction. The film material 103 is conveyed in the vertical direction while being sandwiched between the radial outer surfaces of the heat seal blade 113a. As a result, the film material 103 is provided with a lateral seal extending in the lateral direction as shown by diagonal lines in FIG. 7. As a result, the horizontal seal portion 4 (see FIG. 1 and the like) of the packaging bag 1 can be formed.

The portion of the packaging bag 1 that becomes the storage space S is filled with a content such as a liquid by supplying the liquid to the inside of the film material 103 after the vertical seal is applied by the nozzle 115 as a filling means. Will be done. Then, after the contents are filled and the horizontal seal is applied, the intermediate portion of the portion that is laterally sealed by the pair of heat rolls 113 is cut by the cutter roll 117 arranged below the pair of heat rolls 113. .. In this way, the packaging bag 1 can be manufactured by the manufacturing apparatus 20.

By the way, in manufacturing the packaging bag 1 by such a manufacturing apparatus 20, the idle end portion of the film material 103 folded in half by a pair of heat rolls 111 that also function as drawer rolls of the film material 103 is formed. It is desirable to firmly sandwich the film material 103 and the heat roll 111 so as not to cause slippage. In particular, as the transport speed of the manufacturing apparatus 20 increases, slippage is more likely to occur between the film material 103 and the heat roll 111, so that the force to be sandwiched by the sandwiching portion between the pair of heat rolls 111 is further increased. Is required. Hereinafter, details of the heat seal blades 111a1 and 111b1 of the pair of heat rolls 111 that sandwich and convey the film material 103 in the vertical direction and perform vertical sealing will be described.

As shown in FIG. 8, one heat roll 111a includes a flange-shaped heat seal blade 111a1 protruding outward in the radial direction, and the other heat roll 111b also has a flange-shaped protrusion protruding outward in the radial direction. It is provided with a heat seal blade 111b1. The film material 103 is vertically sandwiched by the sandwiching portion 120 formed between the outer surface of the heat seal blade 111a1 of one heat roll 111a and the outer surface of the heat seal blade 111b1 of the other heat roll 111b. Transported in the direction. Further, the laminated film material 103 is heat-sealed by applying heat and pressure to the sandwiching portion 120. That is, the pair of heat rolls 111 as a pair of rotating bodies sandwiches the overlapped film material 103 by the sandwiching portion 120 and conveys it in the vertical direction, and the films overlapped by applying heat and pressure at the sandwiching portion 120. The material 103 is joined by heat welding. The heat applied to the film material 103 in the sandwiching portion 120 is supplied to the film material 103 by, for example, a heater provided inside at least one of the pair of heat rolls 111. Specifically, the heat roll 111 heated by the heater can supply heat to the film material 103 at the sandwiching portion 120.

FIG. 9 is a diagram showing the outer surface of the heat seal blade 111a1 of one heat roll 111a as one rotating body shown in FIG. As shown in FIG. 9, the outer surface of the heat seal blade 111a1 of the heat roll 111a is provided with a first region, a second region, and a third region. The third region is located between the first region and the second region in the axial direction of the heat roll 111a.

The first region is a region including at least one of a smooth annular surface, a coronal annular surface, and an annular convex portion extending continuously in the circumferential direction. The first region of the present embodiment includes a smooth annular surface 212a and an annular convex portion 214a (shown by vertical lines in FIG. 9) that extend continuously in the circumferential direction, and does not include a coronal annular surface. In other words, the first region is composed of a smooth seal forming region 212 composed of a smooth annular surface 212a and a vertical seal forming region 214 having an annular convex portion 214a. The vertical seal forming region 214 of the present embodiment is an annular recess 214b located between the plurality of annular protrusions 214a and the plurality of annular protrusions 214a (shown as between the annular protrusions 214a indicated by vertical lines in FIG. 9). And, it is composed of. However, the first region is not limited to this configuration, and may be a region including at least one of a smooth annular surface, a coronal annular surface, and an annular convex portion.

The second region is a region having an annular convex portion 211a (shown by a vertical line in FIG. 9) that extends continuously in the circumferential direction. The second region is a vertical seal forming region 211 capable of forming the first vertical seal region 11 in the vertical seal portion 3 of the packaging bag 1. More specifically, the vertical seal forming region 211 as the second region of the present embodiment is an annular recess 211b located between the plurality of annular convex portions 211a and the plurality of annular convex portions 211a (in FIG. 9, vertical lines are used). (Illustrated as between the annular convex portions 211a shown) and.

Hereinafter, for convenience of explanation, the vertical grain seal forming region 211 will be referred to as “first vertical stitch forming region 211”, and the vertical grain seal forming region 214 of the first region described above will be referred to as “second vertical stitch sealing region 214”. It is described as. Further, for convenience of explanation, the annular convex portion 211a of the first vertical seal forming region 211 is referred to as "first annular convex portion 211a", and the annular recess 211b of the first vertical seal forming region 211 is referred to as "first annular recess 211b". The annular convex portion 214a of the second vertical seal forming region 214 will be referred to as a “second annular convex portion 214a”, and the annular recess 214b of the second vertical seal forming region 214 will be referred to as a “second annular concave portion 214b”.

The third region has a convex portion 213a, which at least a part of the heat roll 111a extends continuously in the axial direction or the inclined direction inclined with respect to the axial direction. More specifically, the third region is formed by a plurality of convex portions 213a (shown by horizontal lines in FIG. 9) and a plurality of concave portions 213b formed between the plurality of convex portions 213a (convex portions 213a shown by horizontal lines in FIG. 9). (Illustrated as an interval) and. The third region is a non-vertical seal forming region 213 capable of forming the non-vertical seal region 13 in the vertical seal portion 3 of the packaging bag 1. The non-vertical seal forming region 213 as the third region may have a grid-like unevenness.

FIG. 10 is a diagram showing the outer surface of the heat seal blade 111b1 of the other heat roll 111b as the other rotating body shown in FIG. As shown in FIG. 10, the outer surface of the heat seal blade 111b1 of the other heat roll 111b is provided with a first corresponding region, a second corresponding region, and a third corresponding region.

The first corresponding region is a sealing portion along the surface shape of the first region on the film material by sandwiching the film material with the first region provided on the outer surface of the heat sealing blade 111a1 of one of the heat rolls 111a. Is the area that forms. The second corresponding region is a sealing portion along the surface shape of the second region on the film material by sandwiching the film material with the second region provided on the outer surface of the heat sealing blade 111a1 of one of the heat rolls 111a. Is the area that forms. The third corresponding region is a sealing portion along the surface shape of the third region on the film material by sandwiching the film material with the third region provided on the outer surface of the heat sealing blade 111a1 of one of the heat rolls 111a. Is the area that forms.

More specifically, the first corresponding region of the present embodiment is arranged to face the smooth seal forming region 212 formed by the smooth annular surface 212a (see FIG. 9) of the first region of one heat roll 111a. The corresponding smooth seal forming region 212'composed of the smooth annular surface 212a' that extends continuously in the circumferential direction is included. That is, in the film material 103, the portion sandwiched between the smooth seal forming region 212 of one heat roll 111a and the corresponding smooth seal forming region 212'of the other heat roll 111b is the vertical seal of the packaging bag 1. It is a smooth seal region 12 (see FIG. 1 and the like) in the portion 3.

Further, the first corresponding region of the present embodiment is arranged so as to face the second vertical seal forming region 214 having the second annular convex portion 214a (see FIG. 9) of the first region of one heat roll 111a. Includes a second corresponding vertical seal forming region 214'having an annular recess 214b' (shown as between the annular protrusions 214a'shown by vertical lines in FIG. 10) that extends continuously in the circumferential direction. More specifically, the second corresponding vertical seal forming region 214 ′ is composed of a plurality of annular protrusions 214a ′ and an annular recess 214b ′ located between the plurality of annular protrusions 214a ′. In the second vertical seal forming region 214 of the one heat roll 111a, the second annular convex portion 214a is inserted into the annular concave portion 214b', and the annular convex portion 214a' is inserted into the second annular concave portion 214b. The other heat roll 111b is arranged so as to face the second corresponding vertical seal forming region 214'. That is, the portion of the film material 103 sandwiched between the second vertical seal forming region 214 of one heat roll 111a and the second corresponding vertical seal forming region 214'of the other heat roll 111b is It is the second vertical seal region 14 (see FIG. 1 and the like) of the vertical seal portion 3 of the packaging bag 1.

The second corresponding region of the present embodiment is arranged to face the first vertical seal forming region 211 (see FIG. 9) as the second region of one heat roll 111a, and extends continuously in the circumferential direction. It is a first corresponding vertical seal forming region 211 ′ having an annular recess 211b ′ (shown as between the annular convex portions 211a ′ shown by vertical lines in FIG. 10). More specifically, the first corresponding vertical seal forming region 211'as the second corresponding region of the present embodiment has a shape in which the unevenness of the first vertical seal forming region 211 is inverted. In the first vertical seal forming region 211 of the heat roll 111a, the first annular convex portion 211a is inserted into the annular recess 211b', and the annular convex portion 211a' is inserted into the first annular recess 211b. The other heat roll 111b is arranged so as to face the first corresponding vertical seal forming region 211'. That is, the portion of the film material 103 sandwiched between the first vertical seal forming region 211 of one heat roll 111a and the first corresponding vertical seal forming region 211'of the other heat roll 111b is It is the first vertical seal region 11 (see FIG. 1 and the like) of the vertical seal portion 3 of the packaging bag 1.

The third corresponding region of the present embodiment is the corresponding non-vertical seal forming region 213'arranged so as to face the non-vertical seal forming region 213 (see FIG. 9) as the third region of one heat roll 111a. is there. The corresponding non-vertical seal forming region 213'may have, for example, a shape in which the unevenness of the non-vertical seal forming region 213 of one of the heat rolls 111a is inverted. However, the shape of the corresponding non-vertical seal forming region 213'as the third corresponding region becomes the shape of the non-vertical seal forming region 213 when the film material is sandwiched between the non-vertical seal forming region 213 and the non-vertical seal forming region 213. It suffices as long as it can form a seal portion along the line, and is not limited to a shape in which the unevenness of the non-vertical seal forming region 213 is inverted.

Specifically, the corresponding non-vertical seal forming region 213'of the present embodiment has a shape in which the unevenness of the non-vertical seal forming region 213 of one heat roll 111a is inverted, and the heat roll 111a has a shape in which the unevenness is reversed. A convex portion 213a'(shown by a horizontal line in FIG. 10) entering the concave portion 213b in the non-vertical seal forming region 213 and a concave portion 213b'(shown by a horizontal line) entering the convex portion 213a in the non-vertical seal forming region 213 of one of the heat rolls 111a. In No. 10, it has (shown as between the convex portions 213a'shown by the horizontal line) and. That is, the portion of the film material 103 sandwiched between the non-vertical seal forming region 213 of one heat roll 111a and the corresponding non-vertical seal forming region 213'of the other heat roll 111b is a packaging bag. It is a non-vertical seal region 13 (see FIG. 1 and the like) in the vertical seal portion 3 of 1.

A convex portion 213a provided in the non-vertical seal forming region 213 of one heat roll 111a, at least a part of which extends continuously in an axial direction or an inclined direction inclined with respect to the axial direction, and the other heat roll. The film material 103 can be strongly sandwiched in the sandwiching portion 120 by the concave portion 213b'provided in the corresponding non-vertical seal forming region 213' of 111b into which the convex portion 213a enters. Therefore, the slip of the film material 103 can be suppressed.

In particular, the non-vertical seal forming region 213 on the outer surface of one of the heat rolls 111a of the present embodiment continuously extends in the axial direction (the same direction as the horizontal direction), and the convex portions alternately arranged in the circumferential direction. It has a 213a and a recess 213b. Further, the corresponding non-vertical seal forming region 213'on the outer surface of the other heat roll 111b of the present embodiment continuously extends in the axial direction (the same direction as the horizontal direction) and is alternately arranged in the circumferential direction. It has a convex portion 213a'and a concave portion 213b'. Then, the film material 103 is conveyed in the vertical direction while being sandwiched between the convex portion 213a and the concave portion 213b'and between the convex portion 213a' and the concave portion 213b in the sandwiching portion 120 (see FIG. 8). In this way, by fitting the convex portions and the concave portions extending in the horizontal direction orthogonal to the vertical direction, which is the transport direction of the film material 103, to each other, the film material 103 is sandwiched and transported in the vertical direction. It is possible to make it even more difficult for the film material 103 to slip at the sandwiching portion 120.

The non-vertical seal region 13 of the vertical seal portion 3 of the packaging bag 1 formed by such a pair of heat rolls 111 becomes the horizontal seal region shown in FIGS. 1 to 5. In other words, if the non-vertical seal region 13 of the vertical seal portion 3 of the packaging bag 1 is the horizontal seal region, the packaging bag 1 that forms the vertical seal portion 3 while sandwiching and transporting the film material 103 in the vertical direction is manufactured. In the device 20, slippage of the film material 103 in the vertical direction can be suppressed. As a result, it is possible to suppress the occurrence of wrinkles in the manufactured packaging bag 1.

Further, if the first heat roll 111a is provided with the first vertical seal forming region 211 and the other heat roll 111b is provided with the first corresponding vertical seal forming region 211', the film material 103 is provided in the manufacturing apparatus 20. It is possible to suppress meandering in the lateral direction. Therefore, it is possible to prevent the idle end portions of the laminated film materials 103 from being displaced in the lateral direction. Further, as in the present embodiment, one heat roll 111a is provided with the first vertical seal forming region 211 and the second vertical seal forming region 214, and the other heat roll 111b is provided with the first corresponding vertical seal forming region 211. By providing the'and the second corresponding vertical seal forming region 214', it is possible to further suppress the film material 103 from meandering in the lateral direction in the manufacturing apparatus 20, and the play of the laminated film materials 103 can be further suppressed. It is possible to further suppress the displacement of the end portion in the lateral direction.

The packaging bag, the pair of rotating bodies, and the manufacturing apparatus according to the present invention are not limited to the specific configurations shown in the above-described embodiment, and various modifications can be made without departing from the description of the claims. is there. For example, the vertical seal portion 3 in the packaging bag 1 of the above-described embodiment has a smooth seal region 12 as an inner edge side seal region, a second vertical seal region 14, and an outer edge side seal region in a front view (see FIG. 1). Although it is composed of only three regions, that is, the first vertical seal region 11 and the non-vertical seal region 13 as an intermediate region, the inner edge side sealing region and the outer edge side sealing region are the first vertical seal regions. As long as the order of 11 and the non-vertical seal region 13 as an intermediate region in the horizontal direction is the same, other seal regions may be included.

Further, as shown in FIG. 11, a vertical seal portion may be provided in which a plurality of non-vertical seal regions are provided. Specifically, the vertical seal portion 3 shown in FIG. 11 is provided with three non-vertical seal regions. When the non-vertical seal region 13 described above is set as the first non-vertical seal region 13, the vertical seal portion 3 shown in FIG. 11 has a second non-vertical seal region from the outer edge side to the inner edge side in the horizontal direction. Each area is adjacent to the seal area 15, the first vertical seal area 11, the first non-vertical seal area 13, the second vertical seal area 14, the third non-vertical seal area 16, and the smooth seal area 12 in this order. Is formed. The inner edge side sealing region in FIG. 11 is composed of a second vertical sealing region 14, a third non-vertical sealing region 16, and a smooth sealing region 12. Further, the outer edge side sealing region in FIG. 11 is composed of the first vertical stitch region 11. Further, the intermediate region in FIG. 11 is composed of the first non-vertical seal region 13.

Further, it may be a vertical seal portion having three or more vertical seal regions or a vertical seal portion having four or more non-vertical seal regions.

The present invention relates to a packaging bag, a pair of rotating bodies and a manufacturing apparatus.

1: Packaging bag 2: Folded part 3: Vertical seal part 4: Horizontal seal part 11: First vertical seal area (outer edge side seal area)
11a: First vertical mesh convex portion 11b: Vertical mesh concave portion 12: Smooth sealing area (part of the inner edge side sealing area)
12a: Smooth portion 13: Non-vertical seal region (intermediate region)
13a: Non-vertical convex portion 13b: Non-vertical concave 14: Second vertical sealing area (part of the inner edge side sealing area)
14a: Second vertical mesh convex portion 14b: Vertical mesh concave portion 15: Second non-vertical mesh seal area 16: Third non-vertical mesh seal region (part of the inner edge side sealing region)
20: Manufacturing apparatus 101: Winding roll 103: Film material 105, 107: Guide roll 109: Folding apparatus 111: Pair of heat rolls (pair of rotating bodies)
111a: One heat roll (one rotating body)
111a1: Heat seal blade of one heat roll 111b: The other heat roll (the other rotating body)
111b1: Heat seal blade 113 of the other heat roll: Pair of heat rolls 113a: Heat seal blade 115: Nozzle 117: Cutter roll 120: Holding portion 211: First vertical seal forming region (second region)
211a: 1st annular convex portion 211b: 1st annular recess 211': 1st corresponding vertical seal forming region 211a': annular convex portion 211b': annular recess 212: smooth seal forming region 212a: smooth annular surface 212': corresponding Smooth seal forming region 212a': Smooth annular surface 213: Non-vertical seal forming region 213a: Convex portion 213b: Recessed portion 213': Corresponding non-vertical seal forming region 213a': Convex portion 213b': Recessed portion 214: Second vertical stitch Seal forming region 214a: Second annular convex portion 214b: Second annular recess 214': Second corresponding vertical seal forming region 214a': Annular convex portion 214b': Annular recess S: Accommodating space

Claims (12)

A packaging bag having a strip-shaped vertical seal portion and a horizontal seal portion to which laminated film materials are joined, and a storage space for accommodating the contents is formed by the vertical seal portion and the horizontal seal portion. ,
The vertical seal portion includes an inner edge side sealing area located adjacent to the accommodation space, an outer edge side sealing area formed at a position farther from the accommodation space than the inner edge side sealing area, and the inner edge side sealing area. An intermediate region located between the outer edge side sealing region and the outer edge side sealing region.
The outer edge side sealing region is a vertical sealing region having a vertical convex portion extending continuously in the vertical direction.
The intermediate region has a grid-like unevenness, or at least a part of the intermediate region has a non-vertical convex portion extending continuously in a lateral direction or an inclined direction inclined with respect to the lateral direction. seal area der is,
When the vertical eye seal region is the first vertical eye seal area and the vertical eye convex portion is the first vertical eye convex portion, the inner edge side sealing area is a second vertical extending continuously in the vertical direction. Includes a second vertical seal area with a convex portion
The first vertical seal region and the second vertical seal region are adjacent to the non-vertical seal region.
The non-vertical convex portion of the non-vertical seal region is continuous from the first vertical convex portion of the first vertical seal region to the second vertical convex portion of the second vertical seal region. A packaging bag characterized by being extended <br /> . The inner edge side sealing region has a strip-shaped smooth sealing region that extends continuously in the vertical direction and a strip-shaped satin finish that has an uneven rough surface that extends continuously in the vertical direction and has fine irregularities formed. The packaging bag according to claim 1, wherein the packaging bag comprises at least one of the sealing areas. The non-vertical convex portion is a horizontal convex portion that extends continuously in the horizontal direction.
The packaging bag according to claim 1 or 2 , wherein the non-vertical seal region is a horizontal seal region in which a plurality of horizontal convex portions are formed. The non-vertical convex portion is an inclined convex portion that extends continuously in the inclined direction.
The packaging bag according to claim 1 or 2 , wherein the non-vertical seal region is an inclined seal region in which a plurality of inclined convex portions are formed. The non-vertical convex portion is a V-shaped convex portion that extends continuously in a V shape.
The packaging bag according to claim 1 or 2 , wherein the non-vertical seal region is a V-shaped seal region in which a plurality of V-shaped convex portions are formed. The non-vertical convex portion is a corrugated convex portion that extends continuously in a wavy line in the horizontal direction.
The packaging bag according to claim 1 or 2 , wherein the non-vertical seal region is a corrugated seal region in which a plurality of the corrugated convex portions are formed. The non-vertical convex portion is a bow-shaped convex portion that extends continuously in an arch shape.
The packaging bag according to claim 1 or 2 , wherein the non-vertical seal region is a bow seal region in which a plurality of convex portions of the bow are formed. The packaging bag according to any one of claims 1 to 7 , wherein the vertical seal portion and the horizontal seal portion are heat-sealed portions in which the laminated film materials are heat-welded. A pair of rotating bodies that sandwich the laminated film materials by the sandwiching portion and convey them in the vertical direction, and join the film materials laminated by heat and pressure at the sandwiching portion.
On the outer surface of one rotating body, a first region including at least one of a smooth annular surface, a satin ring surface, and an annular convex portion extending continuously in the circumferential direction and a first region continuously extending in the circumferential direction are extended. It is located between the second region having an annular convex portion and the first region and the second region in the axial direction of the one rotating body, and has a grid-like unevenness, or at least a part thereof. A third region having a convex portion continuously extending in the axial direction or the inclined direction inclined with respect to the axial direction is provided.
The outer surface of the other rotating body is arranged so as to face the first region, and by sandwiching the film material with the first region, the film material follows the surface shape of the first region. The surface shape of the second region is formed on the film material by sandwiching the film material between the first corresponding region forming the seal portion and the second region and arranging the film material so as to face the second region. By sandwiching the film material between the second corresponding region forming the seal portion along the above and the third region, which is arranged so as to face the third region, the film material can be covered with the third region. A third corresponding region, which forms a seal portion along the surface shape, is provided .
The second region is a first vertical seal forming region, and is
The first region includes a second vertical seal forming region including the annular protrusion.
The first vertical seal forming region and the second vertical seal forming region are adjacent to the third region.
The convex portion of the third region continuously extends from the annular convex portion of the first vertical seal forming region to the annular convex portion of the second vertical seal forming region. > A pair of rotating bodies characterized by that. A packaging bag manufacturing apparatus comprising the pair of rotating bodies according to claim 9 . The number of the first vertical eye convex portions in the first vertical eye seal region and the distance between the adjacent first vertical eye convex portions are the number of the second vertical eye convex portions in the second vertical eye seal region. The packaging bag according to any one of claims 1 to 8, wherein the distance between the two adjacent vertical protrusions is the same. The number of the annular protrusions in the first vertical seal forming region and the distance between the adjacent annular protrusions are the number of the annular protrusions in the second vertical seal forming region and the adjacent annular protrusions. The pair of rotating bodies according to claim 9 or 10 , wherein the intervals are the same as those of the above.

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